PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-09:42:50
G08     267.4          18.5                4.2 +/-    2.39       9.5 +/-    2.39  0.140 / 0.240
G10     61.7           57.6                4.2 +/-    0.49       4.9 +/-    0.49  0.110 / 0.210
G11     311.4          17.5               -3.0 +/-   12.69      -7.1 +/-   12.69  0.170 / 0.380
G14     266.3          66.8                3.8 +/-    1.11       4.1 +/-    1.11  0.190 / 0.390
G18     312.0          33.4                1.6 +/-    1.05       2.5 +/-    1.05  0.030 / 0.030
G20     95.2           36.7                4.4 +/-    0.64       6.7 +/-    0.64  0.040 / 0.040
G21     154.4          14.3                5.8 +/-    2.54      14.7 +/-    2.54  0.050 / 0.060
G27     233.6          16.8                4.6 +/-    1.93      11.0 +/-    1.93  0.040 / 0.060
G31     178.9          29.1                5.1 +/-    2.30       9.1 +/-    2.30  0.080 / 0.240
G32     316.5          74.4                4.4 +/-    0.82       4.6 +/-    0.82  0.080 / 0.190